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3 July, 23:02

the ratio of red marbles to blue marbles in a bag is 3:4. if there are 42 marbles in the bag, how many of the marbles are red?

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  1. 3 July, 23:07
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    18

    Step-by-step explanation:

    Sum the parts of the ratio, 3 + 4 = 7

    Divide the amount of marbles by 7 to find the value of one part of the ratio

    42 : 7 = 6 ← value of 1 part of the ratio, thus

    red marbles = 3 * 6 = 18
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